Rechargeable battery controlling circuit, rechargeable battery controlling device, independent power system and battery pack

Abstract

This invention offer a rechargeable-battery controlling device and an independent power system that is cheap and low power consumption. First current is created by amplifying and copying current flow through one diode or plural serially connected diodes, and first voltage is created by flowing said first current through resistance load and converting to voltage, and switching element is on-off-controlled by said first voltage, and the switching element works to prevent overcharge and overdischarge. This detects an alteration of voltage and the device protects from overcharge and overdischarge. By this, by small parts, the protection circuit for overcharge and overdischarge can be realized and power consumption can be suppressed.

1 . Rechargeable battery controlling circuit,
 wherein first current is created by amplifying and copying current flow through one diode or plural serially connected diodes,   wherein first voltage is created by flowing said first current through resistance load and converting to voltage,   wherein switching element is on-off-controlled by said first voltage.   
     
     
         2 . Rechargeable battery controlling circuit as claimed in  claim 1 ,
 wherein said switching element is at least one MOS transistor.   
     
     
         3 . Rechargeable battery controlling circuit as claimed in  claim 1 ,
 wherein said one diode or plural serially connected diodes contains or contain at least one LED.   
     
     
         4 . Rechargeable battery controlling circuit as claimed in  claim 1 ,
 wherein said one diode or plural serially connected diodes contains or contain at least one Zener diode.   
     
     
         5 . Rechargeable battery controlling circuit as claimed in  claim 1 ,
 wherein amount of diode or kind of diode or both on the channel that current flows through said one diode or plural serially connected diodes is changeable by switch.   
     
     
         6 . Rechargeable battery controlling device,
 wherein first current is created by amplifying and copying current flow through one diode or plural serially connected diodes,   wherein first voltage is created by flowing said first current through resistance load and converting to voltage,   wherein first switching element is on-off-controlled by said first voltage,   wherein when power generating device voltage increases over a first constant voltage, current flow through said one diode or plural serially connected diodes increases and by switching off said first switching element, power generating device and rechargeable battery are detached.   
     
     
         7 . Rechargeable battery controlling device as claimed in  claim 6 ,
 wherein said first switching element is at least one MOS transistor.   
     
     
         8 . Rechargeable battery controlling device as claimed in  claim 6 ,
 wherein said one diode or plural serially connected diodes contains or contain at least one LED.   
     
     
         9 . Rechargeable battery controlling device as claimed in  claim 6 ,
 wherein second current is created by amplifying and copying current flow through second one diode or plural serially connected diodes,   wherein second voltage is created by flowing said second current through resistance load and converting to voltage,   wherein third voltage is created by amplifying said second voltage,   wherein second switching element is on-off-controlled by said third voltage,   wherein when power generating device voltage decreases below second constant voltage, current flow through said one diode or plural serially connected diodes decrease and by switching off said second switching element, power generating device and rechargeable battery are detached,   wherein said first constant voltage is higher than said second constant voltage.   
     
     
         10 . Rechargeable battery controlling device as claimed in  claim 9 ,
 wherein said first switching element and said second switching element is at least one MOS transistor.   
     
     
         11 . Rechargeable battery controlling device as claimed in  claim 9 ,
 wherein said first one diode or plural serially connected diodes contains or contain at least one LED.   
     
     
         12 . Independent power system comprising a power generating device and a rechargeable battery,
 wherein first current is created by amplifying and copying current flow through one diode or plural serially connected diodes,   wherein first voltage is created by flowing said first current through resistance load and converting to voltage,   wherein first switching element is on-off-controlled by said first voltage,   wherein when power generating device voltage increases over first constant voltage, current flow through said one diode or plural serially connected diodes increases and by switching off said first switching element, said power generating device and said rechargeable battery are detached.   
     
     
         13 . Independent power system as claimed in  claim 12 ,
 wherein said switching element is at least one MOS transistor.   
     
     
         14 . Independent power system as claimed in  claim 12 ,
 wherein second current is created by amplifying and copying current flow through second one diode or plural serially connected diodes,   wherein second voltage is created by flowing said second current through resistance load and converting to voltage,   wherein third voltage is created by amplifying said second voltage,   wherein second switching element is on-off-controlled by said third voltage,   wherein when power generating device voltage decreases below second constant voltage, current flow through said one diode or plural serially connected diodes decrease and by switching off said second switching element, output-system and said rechargeable battery are detached,   wherein said first constant voltage is higher than said second constant voltage.   
     
     
         15 . Independent power system as claimed in  claim 14 ,
 wherein said switching element is at least one MOS transistor.   
     
     
         16 . Independent power system as claimed in  claim 12 ,
 wherein said power generating device uses natural energy.   
     
     
         17 . Independent power system as claimed in  claim 12 ,
 wherein said power generating device is a photovoltaic module or a photovoltaic panel or a photovoltaic array.   
     
     
         18 . Independent power system as claimed in  claim 17 ,
 wherein said rechargeable battery is a lead-acid battery.   
     
     
         19 . Independent power system as claimed in  claim 18 ,
 wherein said one diode or plural serially connected diodes contains or contain at least one LED.   
     
     
         20 . Battery pack,
 which has rechargeable battery controlling circuit as claimed in  claim 1 .